Multiple‐Input Multiple‐Output High‐voltage AC–AC Converters

A multiple‐input multiple‐output high‐voltage AC‐AC converter will be useful in situations with several AC inputs or outputs. By using the multiple‐input multiple‐output AC‐AC converter, several wind turbine generators can share one converter, which results in reduced switching components and simplified system structure. This chapter introduces the single‐input single‐output AC‐AC converter, which is a special case of the multi‐terminal AC‐AC converter to describe the operating principle of the proposed structure. It discusses the single‐phase and three‐phase multiple‐input multiple‐output converters. The chapter provides the carrier phase‐shifted sinusoidal pulse‐width modulation (CPS‐SPWM) scheme which has been applied to the proposed converter, and the simulation wave forms to verify the feasibility of the proposed high‐voltage AC‐AC converter. The unique characteristics of the proposed converter include that no high‐voltage DC link capacitor is needed and only one converter is used, which will be suitable for the multi‐terminal high‐voltage AC systems.